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How long ago was the earth actually formed.
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| Do you know how long ago that the earth was formed? | |
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| Yes I do. The earth was formed about 500 million years ago. | |
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How long ago the aquatic organism called blue-green algae was formed.
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| How many years ago was the early aquatic organisms called blue-green algae form? | |
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| The early aquatic organisms called blue-green algae was formed around 1 billion yes ago. | |
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| What do the following abreviations stand for:H2,CH4,CO,H2O,and N2? | |
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| H2=hydrogen,CH4=methane,CO=carbon monoxide,H2O=water,and N2=nitrogen. | |
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